Security Hardening

Debian 13 — php-phpseclib3 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — php-phpseclib3 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-30130 CVE-2023-27560 CVE-2023-48795 CVE-2023-49316 CVE-2023-52892 CVE-2024-27354 CVE-2024-27355 CVE-2026-32935  +2 more Upstream summary: phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification. Table of contents […]

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Debian 13 — freeradius — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — freeradius — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0967 CVE-2003-0968 CVE-2004-0938 CVE-2004-0960 CVE-2004-0961 CVE-2005-1454 CVE-2005-1455 CVE-2005-4744  +12 more Upstream summary: rad_decode in FreeRADIUS 0.9.2 and earlier allows remote attackers to cause a denial of service (crash) […]

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Debian 11 — maildrop — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — maildrop — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-2655 CVE-2010-0301 Upstream summary: lockmail in maildrop before 1.5.3 does not drop privileges before executing commands, which allows local users to gain privileges via command line arguments. Table […]

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Debian 13 — nagvis — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — nagvis — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-33178 CVE-2022-3979 CVE-2022-46945 CVE-2023-46287 CVE-2024-13722 CVE-2024-13723 CVE-2024-38866 CVE-2024-47090  +2 more Upstream summary: The Manage Backgrounds functionality within NagVis versions prior to 1.9.29 is vulnerable to an authenticated path […]

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Debian 12 — rust-bumpalo — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — rust-bumpalo — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-35861 Upstream summary: An issue was discovered in the bumpalo crate before 3.2.1 for Rust. The realloc feature allows the reading of unknown memory. Attackers can potentially read […]

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Debian 12 — gawk — vulnerability — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — gawk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-4156 Upstream summary: A heap out-of-bounds read flaw was found in builtin.c in the gawk package. This issue may lead to a crash and could be used to […]

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Debian 11 — libuser — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libuser — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-0002 CVE-2012-5630 CVE-2012-5644 CVE-2015-3245 CVE-2015-3246 Upstream summary: libuser before 0.57 uses a cleartext password value of (1) !! or (2) x for new LDAP user accounts, which makes […]

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Debian 11 — c-ares — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — c-ares — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-5180 CVE-2017-1000381 CVE-2020-14354 CVE-2020-22217 CVE-2020-8277 CVE-2021-3672 CVE-2022-4904 CVE-2023-31124  +4 more Upstream summary: Heap-based buffer overflow in the ares_create_query function in c-ares 1.x before 1.12.0 allows remote attackers to […]

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Debian 11 — augeas — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — augeas — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-0786 CVE-2012-0787 CVE-2012-6607 CVE-2013-6412 CVE-2017-7555 CVE-2025-2588 Upstream summary: The transform_save function in transform.c in Augeas before 1.0.0 allows local users to overwrite arbitrary files and obtain sensitive information […]

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